Adding-machine.



o. W. GooGH.' ADDING MACHINE. APPLIOATIONPILED 00T. l0, 1907.

93 1 ,410, Patented Aug. 17, 1909.

UNITED sTATEs PATENT OFFICE.

CLAIBORNE W. GOOCH, OF LYNCHBURG, VIRGINIA, ASSIGNOR TO BURROUGHS ADDINGMACHINE COMPANY, OF DETROIT, MICHIGAN, A CORPORATION OF MICHIGAN.

Asume-MACHINE..

specification of Letters Patent. Application med october 10,1901. serialNo. 396,854.

Patented Aug. 17, 1909.

To all whom 'it lmay concern.'

Be it lgnown that I, CLAIBORNE W. GoocH, a citizerf of the UnitedStates, residing at Lynchburg, in the county of Campbell and State ofVirginia, have invented certain new and useful Improvements inAdding-Ma-- chines, of which the following/is a specification.

The present invention relates more particularly to the recording orprinting mechanism of an adding machine, and the object is to provideanimproved form of means for regulating the force of the blow of .thehammers which drive the type against the platen. This is desirable inorder toprovide for preperly adjusting .the machine to the work 1n hand.Thus when a considerabie number of carbon copies are to be made greaterforce in the hammer blow is necessary ythan when a less number of carbon.ce ies or no carbone at all are to be .produc Ofv course with the'hammer-actuating devices arranged to eect a printing blow suiiicientfor the maximum number vo'f carbon ccxipies the machine would be equip dtope Work without a solutely re orm all sorts ef 'ing differentadjustments for different k1 s of work in hand. However, .the use of themachine with hammer-actuating springs under eX- oessive tension would beproductive' of undue wear and so it is desirable te provide for eguglating the tension of such springs accordlng to the requirementsof thework to be rperformed.

In the resent instance the invention is.

shown an described as adapted te a wellknown form of adding machine,Ato-Wit the Burroughs machine exemplified in rior pat- 'entsN0s.504,963and 565,078 issue September 12, 1893. It is tobe understood,how- 1 ever, that the invention may be adapted to other types of addingmachines;

Burrou ty to show .the resent invention em odie therein; and Fig. 2represents A a partial cross-section ef such machine, the

nt elevation.

. uor arrangement from vthose ployed in the well-known .Burrou maf chineand hence require no extende discussion although they Will be brieflyreferred to inasmuch as the new parts for carrying out the present`invention are' more or less directly associated with them.

familiarly Aemsol The reference numeral 600 designates a 5 cross-shafton which are loosely hun aseries of levers 611 with segmentai rear en scarryin 'type' lates 618.

he re erence numeral 1798 designates a roller platen against which the tplates are driven by hammers 715, the latter bein pivotally mounted andoperatively engager With the drivin levers t716, also pivotally mounted.The -atter have springs 780 connected with them and tending to 1m l themrearwardly and thus drive the I rs against the type plates. .arenormally restrained by iatciies 717 pivoted upon a suitable cross-shaftand engagingl the upper ends of the driving levers respectively. The dis`lacement of these latches to release the emmers is bron ht Said drivinglevers about'through paWls 718'engaging shoul ers ef the iatches, thesepawls being pivetally mounted upon thecross-.bar or rod of a bail 719which vibrates at each operation of the machine. The springs 78@ areconnected with said paWls s o as to serve the double purpose etactuating the driving levers 716 and holding the pawls in engagementwith the latches.

are retracted by a bail 712 which is connected by a link 729 with acrank plate 801 on a. rock-shaft 80@ which oscllates in everyoperationpf the machine.

All of the 4above designated mechanical elements are volid and theyoperate in -a' welli known manner. However, in' the present iinstance'the springs 780 are mede consider- In -the accompanyingdrawings which form -partlof thisspeciiication Figure 1 represents l 1nleft side elevation, partly in section, a suff iicientsportion of. anaddinginachine ofthe ably stronger than corresponding springs usuallyemployed. These springs in the present instance are made strong enoughto drive the hammers with the v maximum force. As before stated undueweer would result from the action of such springs when the workin handdoes not require such force in the hammer bloisT as when less than themaximum number of carbon copies are to be made-or no carbon co ies at IaIn carrying out t f present invention The hammers and their driversmeans are provided for lessening the force of the springs 7 80 invarying degree accordin to the work in hand. Thus additiona i springs `2are attached to the forwardly-extending portions of the driving levers717 so as to act in' o position to the springs 780. These additionasprings are attached to the cross-rod of a bail-I5 whose side arms areYsecured to a rock-shaft 4 j ournaled in the base casting 1065 of themachine. When the sprin s 2 arein line With the bail as illusfromcausing an 4eective hammer blow.

The adj'ustment of the springs 2 is brought f about throu h theturningofthe rock-shaft 4 and to fac' itate this said shaft has onel endprojecting beyond the base casting of the .machine and equipped with athumb-piece segmental plate 6 with a seriesoil perfora,

or knob 5. For t e purpose of locking the bail in different adjustmentstherev is secured to the rock-shaft just in rear of said knob a tions orapertures 7 and there is mounted upon the base casting1065 a screw stud8 des1 ned to engage any one of said a ertures.

T e rock-shaft 4 is permitted a slig t longitudinal movement sufficientto disengage the late 6 from said pin or stud so that it may iie turnedto diii'erent positions and the plate rengaged with the stud. A spiralspring 9, surrounding the shaft between the collar thereon and a part ofthe base casting 1065,

.normally holds said plate engaged with the stud. y

It will be seen that the above-described construction provides meansunder control ofthe operator whereby the force of the hammer blow can bereadily regulated accordin to the requirements of the work in hand anthus the object of the invention is fulfilled.

While the particular form of means'above" described is well adapted tothe fulfillment ofy that object it is nevertheless to be under-v 'lstood that modifications may be made without necessarily departing fromthe scope of the invention.

, What .is claimed is:

1. In a machine of the character described, the combination of a hammeradapted to strike a printing blow, a s ring for actuating said hammer toelect suc blow with maximum force, and means for counteractlng saldspring in varying degree.

2. In a machine ofthe character described,

the combination of a hammer adapted to strike a printing blow, a springfor actuating spring for actuating spring acting in. opposition to theiirs't-menthe combination of a hammer adapted to strike a printing blow,a spring for actuating said hammer, a second spring acting upon saidhammer, and .means for adjusting the latter s ring to varythe force otte rinting blow e ected bythe rst-mentione spring.

4. In a machine ofthe character described,

vthe combination of a printing hammer, a

spring for actuating e same, j a second spring acting in opposition tothe first-menltloned s ring, and means for varying thetension of t esecond spring to vary the force of the printing blow ofthe hammer.

5. The combination with a platen, type, a i

pivoted hammer to drive the type against the platen, a pivoted driverfor said hammer, and aspring actuating said driver.; of a second sprlngapplied to the latter in opposition tothe inst-,mentioned spring, andmeans for varying the tension of said second spring.

6. In a machine ofthe character described, i

the combination of a spring for actuating t e same, a second springacting in opposition to the irst-mentloned s ring, and means for varyingthe tension of t e second sv rin to vary the force of the printing blowo theiammer, said means comprising an adjustable arm supporting one endof sai second s ring.l

7. In a machine o the character described, the i combination of. arinting hammer, a spring for actuating t e same, a second spring actingin opposition to the irst-mentioned s ring,l and means for varying thetension of t e second s rin to vary the force of the printing blow otheiammer, said means comprising a pivoted arm supporting one end ofsaid second spring and adapted through itspivotal movement to vary thevtension thereof.

8. In a machine ofthe character described, the combination of a printinghammer, -a t e same, a second tloned s ring, and means for varying thetension of t e second s ring to vary the force of the vprinting blow othe hammer, said means l comprising an adjustable arm supportin one endof said second spring, and means for ocking said arm at diderentadjustments. 1

rinting hammer, a

9. In a machine of the character described 'i the combination of arinting hammer, a spring for actuating 4t e same, a second spring actingin opposition to the first-mentloned spring, means for varying thetension of the second spring to vary the force of the printing blow ofthe hammer, said means comprising a pivoted arm supporting one end ofsaid second spring and a apted through.

its pivotal movement to vary thetension thereof, and -means for lockingsaid arm at different adjustments.

10. The combination with a platen, type, a pivoted hammer to drive thety e, against the platen, .a pivoted driver for said) hammer, and aspring actuating said driver of a second spring attached at one end tothe latter and acting in opposition to said iirst-mentioned spring, andan arm supportin the other end-of said second spring and a justable tovary the tension thereof.

11. The combination with a platen, type,

` a pivoted hammer to drive the type against a pivotedhammer to drivethe type against the platen, a pivoted driver for said hammer,

and a springactuating said driver; of a second sprmg attached at one endto the'latter and acting in opposition to saidirstmentioned spring, anarm supporting the' other end of said second spring and adjustable tovary the tension thereof, and meansfor locking said arm at differentad'ustments.

13. .The 'combination wit a platen, type, a pivoted hammer to drive thetyae against the platen, a pivoted driver for sai hammer, and a springactuating said driver; of a second spring attached at one end toy thelatter and acting in opposition to said -irst-mentioned spring, aplvoted arm supporting the other end of said second spring and adaptedthrough its pivotal movement to vary the tensionthereof, and means forlocking said arm at different adjustments.

CLAIBORNE GOOCH.

Witnesses:

E. P. MILLER, v J. D. OWEN.

